| Message ID | 20200622022055.16028-1-bruceshenzk@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | net: ath10k: santity check for ep connectivity | expand |
Zekun Shen <bruceshenzk@gmail.com> writes: > Function ep_rx_complete is being called without NULL checking > in ath10k_htc_rx_completion_handler. Without such check, mal- > formed packet is able to cause jump to NULL. > > ep->service_id seems a good candidate for sanity check as it is > used in usb.c. > > Signed-off-by: Zekun Shen <bruceshenzk@gmail.com> > --- > drivers/net/wireless/ath/ath10k/htc.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c > index 31df6dd04..e00794d97 100644 > --- a/drivers/net/wireless/ath/ath10k/htc.c > +++ b/drivers/net/wireless/ath/ath10k/htc.c > @@ -450,6 +450,11 @@ void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb) > > ep = &htc->endpoint[eid]; > > + if (ep->service_id == 0) { > + ath10k_warn(ar, "HTC Rx: ep %d is not connect\n", eid); > + goto out; > + } I think using ATH10K_HTC_SVC_ID_UNUSED is more descriptive than zero, as ath10k_htc_reset_endpoint_states() uses it. I fixed in the pending branch. I think also ath10k_htc_process_credit_report() might have a similar problem, can you take a look?
diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c index 31df6dd04..e00794d97 100644 --- a/drivers/net/wireless/ath/ath10k/htc.c +++ b/drivers/net/wireless/ath/ath10k/htc.c @@ -450,6 +450,11 @@ void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb) ep = &htc->endpoint[eid]; + if (ep->service_id == 0) { + ath10k_warn(ar, "HTC Rx: ep %d is not connect\n", eid); + goto out; + } + payload_len = __le16_to_cpu(hdr->len); if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
Function ep_rx_complete is being called without NULL checking in ath10k_htc_rx_completion_handler. Without such check, mal- formed packet is able to cause jump to NULL. ep->service_id seems a good candidate for sanity check as it is used in usb.c. Signed-off-by: Zekun Shen <bruceshenzk@gmail.com> --- drivers/net/wireless/ath/ath10k/htc.c | 5 +++++ 1 file changed, 5 insertions(+)